./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5a6204b8fe11d129da43c7784d578168196f39a9dd912e242b1920607a0dfe2c --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 15:17:58,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 15:17:58,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 15:17:58,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 15:17:58,364 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 15:17:58,365 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 15:17:58,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 15:17:58,368 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 15:17:58,370 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 15:17:58,371 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 15:17:58,372 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 15:17:58,373 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 15:17:58,373 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 15:17:58,374 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 15:17:58,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 15:17:58,377 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 15:17:58,378 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 15:17:58,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 15:17:58,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 15:17:58,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 15:17:58,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 15:17:58,388 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 15:17:58,390 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 15:17:58,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 15:17:58,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 15:17:58,401 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 15:17:58,401 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 15:17:58,402 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 15:17:58,403 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 15:17:58,404 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 15:17:58,405 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 15:17:58,405 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 15:17:58,406 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 15:17:58,407 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 15:17:58,408 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 15:17:58,409 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 15:17:58,410 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 15:17:58,411 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 15:17:58,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 15:17:58,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 15:17:58,412 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 15:17:58,413 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 15:17:58,434 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 15:17:58,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 15:17:58,435 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 15:17:58,435 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 15:17:58,435 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 15:17:58,436 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 15:17:58,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 15:17:58,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 15:17:58,437 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 15:17:58,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 15:17:58,437 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 15:17:58,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 15:17:58,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 15:17:58,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 15:17:58,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 15:17:58,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 15:17:58,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 15:17:58,438 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 15:17:58,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 15:17:58,439 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 15:17:58,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 15:17:58,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 15:17:58,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 15:17:58,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 15:17:58,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:17:58,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 15:17:58,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 15:17:58,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 15:17:58,441 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 15:17:58,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 15:17:58,441 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 15:17:58,441 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 15:17:58,441 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 15:17:58,442 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 15:17:58,442 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a6204b8fe11d129da43c7784d578168196f39a9dd912e242b1920607a0dfe2c [2021-12-14 15:17:58,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 15:17:58,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 15:17:58,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 15:17:58,701 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 15:17:58,701 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 15:17:58,702 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-14 15:17:58,756 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/766c0e167/8355e6119df04b4daab2a03072b219b6/FLAGf5f06b4b3 [2021-12-14 15:17:59,204 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 15:17:59,205 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-14 15:17:59,214 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/766c0e167/8355e6119df04b4daab2a03072b219b6/FLAGf5f06b4b3 [2021-12-14 15:17:59,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/766c0e167/8355e6119df04b4daab2a03072b219b6 [2021-12-14 15:17:59,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 15:17:59,575 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 15:17:59,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 15:17:59,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 15:17:59,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 15:17:59,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:17:59" (1/1) ... [2021-12-14 15:17:59,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bc40ccb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:17:59, skipping insertion in model container [2021-12-14 15:17:59,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:17:59" (1/1) ... [2021-12-14 15:17:59,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 15:17:59,634 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 15:17:59,901 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4938,4951] [2021-12-14 15:17:59,933 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:17:59,948 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 15:17:59,993 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4938,4951] [2021-12-14 15:18:00,002 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:18:00,020 INFO L208 MainTranslator]: Completed translation [2021-12-14 15:18:00,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:18:00 WrapperNode [2021-12-14 15:18:00,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 15:18:00,022 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 15:18:00,022 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 15:18:00,022 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 15:18:00,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:18:00" (1/1) ... [2021-12-14 15:18:00,045 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:18:00" (1/1) ... [2021-12-14 15:18:00,079 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 338 [2021-12-14 15:18:00,082 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 15:18:00,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 15:18:00,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 15:18:00,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 15:18:00,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:18:00" (1/1) ... [2021-12-14 15:18:00,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:18:00" (1/1) ... [2021-12-14 15:18:00,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:18:00" (1/1) ... [2021-12-14 15:18:00,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:18:00" (1/1) ... [2021-12-14 15:18:00,110 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:18:00" (1/1) ... [2021-12-14 15:18:00,124 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:18:00" (1/1) ... [2021-12-14 15:18:00,125 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:18:00" (1/1) ... [2021-12-14 15:18:00,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 15:18:00,133 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 15:18:00,133 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 15:18:00,133 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 15:18:00,135 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:18:00" (1/1) ... [2021-12-14 15:18:00,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:18:00,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:18:00,169 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 15:18:00,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 15:18:00,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 15:18:00,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 15:18:00,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 15:18:00,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 15:18:00,341 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 15:18:00,343 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 15:18:00,633 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 15:18:00,639 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 15:18:00,639 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 15:18:00,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:18:00 BoogieIcfgContainer [2021-12-14 15:18:00,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 15:18:00,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 15:18:00,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 15:18:00,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 15:18:00,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:17:59" (1/3) ... [2021-12-14 15:18:00,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@530bad0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:18:00, skipping insertion in model container [2021-12-14 15:18:00,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:18:00" (2/3) ... [2021-12-14 15:18:00,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@530bad0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:18:00, skipping insertion in model container [2021-12-14 15:18:00,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:18:00" (3/3) ... [2021-12-14 15:18:00,665 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-14 15:18:00,669 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 15:18:00,669 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 15:18:00,711 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 15:18:00,724 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 15:18:00,739 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 15:18:00,768 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 79 states have (on average 1.7088607594936709) internal successors, (135), 80 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:00,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-14 15:18:00,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:18:00,775 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:18:00,776 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:18:00,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:18:00,782 INFO L85 PathProgramCache]: Analyzing trace with hash 377049112, now seen corresponding path program 1 times [2021-12-14 15:18:00,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:18:00,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923492355] [2021-12-14 15:18:00,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:18:00,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:18:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:18:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:18:01,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:18:01,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923492355] [2021-12-14 15:18:01,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923492355] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:18:01,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:18:01,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:18:01,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34455105] [2021-12-14 15:18:01,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:18:01,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:18:01,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:18:01,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:18:01,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:18:01,149 INFO L87 Difference]: Start difference. First operand has 81 states, 79 states have (on average 1.7088607594936709) internal successors, (135), 80 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:01,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:18:01,231 INFO L93 Difference]: Finished difference Result 183 states and 292 transitions. [2021-12-14 15:18:01,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:18:01,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-14 15:18:01,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:18:01,246 INFO L225 Difference]: With dead ends: 183 [2021-12-14 15:18:01,246 INFO L226 Difference]: Without dead ends: 122 [2021-12-14 15:18:01,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:18:01,254 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 84 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:18:01,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 273 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:18:01,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-14 15:18:01,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2021-12-14 15:18:01,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.4705882352941178) internal successors, (175), 119 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:01,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 175 transitions. [2021-12-14 15:18:01,315 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 175 transitions. Word has length 48 [2021-12-14 15:18:01,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:18:01,316 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 175 transitions. [2021-12-14 15:18:01,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:01,318 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 175 transitions. [2021-12-14 15:18:01,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-14 15:18:01,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:18:01,321 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:18:01,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 15:18:01,322 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:18:01,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:18:01,325 INFO L85 PathProgramCache]: Analyzing trace with hash 292717965, now seen corresponding path program 1 times [2021-12-14 15:18:01,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:18:01,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830752395] [2021-12-14 15:18:01,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:18:01,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:18:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:18:01,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:18:01,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:18:01,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830752395] [2021-12-14 15:18:01,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830752395] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:18:01,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:18:01,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:18:01,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819242064] [2021-12-14 15:18:01,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:18:01,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:18:01,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:18:01,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:18:01,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:18:01,452 INFO L87 Difference]: Start difference. First operand 120 states and 175 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:01,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:18:01,482 INFO L93 Difference]: Finished difference Result 292 states and 447 transitions. [2021-12-14 15:18:01,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:18:01,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-14 15:18:01,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:18:01,484 INFO L225 Difference]: With dead ends: 292 [2021-12-14 15:18:01,486 INFO L226 Difference]: Without dead ends: 198 [2021-12-14 15:18:01,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:18:01,488 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 62 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:18:01,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 231 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:18:01,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-12-14 15:18:01,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 196. [2021-12-14 15:18:01,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.5128205128205128) internal successors, (295), 195 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:01,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 295 transitions. [2021-12-14 15:18:01,507 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 295 transitions. Word has length 49 [2021-12-14 15:18:01,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:18:01,507 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 295 transitions. [2021-12-14 15:18:01,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:01,508 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 295 transitions. [2021-12-14 15:18:01,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-14 15:18:01,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:18:01,509 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:18:01,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 15:18:01,510 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:18:01,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:18:01,510 INFO L85 PathProgramCache]: Analyzing trace with hash -875864605, now seen corresponding path program 1 times [2021-12-14 15:18:01,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:18:01,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156192862] [2021-12-14 15:18:01,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:18:01,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:18:01,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:18:01,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:18:01,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:18:01,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156192862] [2021-12-14 15:18:01,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156192862] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:18:01,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:18:01,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:18:01,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568715595] [2021-12-14 15:18:01,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:18:01,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:18:01,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:18:01,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:18:01,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:18:01,603 INFO L87 Difference]: Start difference. First operand 196 states and 295 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:01,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:18:01,640 INFO L93 Difference]: Finished difference Result 504 states and 781 transitions. [2021-12-14 15:18:01,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:18:01,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-12-14 15:18:01,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:18:01,643 INFO L225 Difference]: With dead ends: 504 [2021-12-14 15:18:01,644 INFO L226 Difference]: Without dead ends: 334 [2021-12-14 15:18:01,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:18:01,646 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 57 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:18:01,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 227 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:18:01,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-12-14 15:18:01,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 332. [2021-12-14 15:18:01,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 1.5317220543806647) internal successors, (507), 331 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:01,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 507 transitions. [2021-12-14 15:18:01,674 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 507 transitions. Word has length 50 [2021-12-14 15:18:01,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:18:01,675 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 507 transitions. [2021-12-14 15:18:01,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:01,675 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 507 transitions. [2021-12-14 15:18:01,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-14 15:18:01,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:18:01,676 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:18:01,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 15:18:01,677 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:18:01,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:18:01,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1524907140, now seen corresponding path program 1 times [2021-12-14 15:18:01,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:18:01,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39783249] [2021-12-14 15:18:01,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:18:01,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:18:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:18:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:18:01,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:18:01,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39783249] [2021-12-14 15:18:01,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39783249] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:18:01,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:18:01,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:18:01,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304915599] [2021-12-14 15:18:01,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:18:01,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:18:01,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:18:01,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:18:01,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:18:01,748 INFO L87 Difference]: Start difference. First operand 332 states and 507 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:01,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:18:01,959 INFO L93 Difference]: Finished difference Result 2780 states and 4355 transitions. [2021-12-14 15:18:01,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 15:18:01,960 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-14 15:18:01,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:18:01,973 INFO L225 Difference]: With dead ends: 2780 [2021-12-14 15:18:01,974 INFO L226 Difference]: Without dead ends: 2474 [2021-12-14 15:18:01,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-14 15:18:01,988 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 697 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:18:01,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 1115 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:18:01,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-12-14 15:18:02,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 636. [2021-12-14 15:18:02,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 1.5291338582677165) internal successors, (971), 635 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:02,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 971 transitions. [2021-12-14 15:18:02,073 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 971 transitions. Word has length 51 [2021-12-14 15:18:02,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:18:02,074 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 971 transitions. [2021-12-14 15:18:02,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:02,074 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 971 transitions. [2021-12-14 15:18:02,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-14 15:18:02,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:18:02,077 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:18:02,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 15:18:02,078 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:18:02,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:18:02,078 INFO L85 PathProgramCache]: Analyzing trace with hash -48905761, now seen corresponding path program 1 times [2021-12-14 15:18:02,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:18:02,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365154353] [2021-12-14 15:18:02,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:18:02,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:18:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:18:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:18:02,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:18:02,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365154353] [2021-12-14 15:18:02,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365154353] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:18:02,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:18:02,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:18:02,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412916702] [2021-12-14 15:18:02,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:18:02,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:18:02,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:18:02,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:18:02,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:18:02,278 INFO L87 Difference]: Start difference. First operand 636 states and 971 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:02,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:18:02,411 INFO L93 Difference]: Finished difference Result 1248 states and 1917 transitions. [2021-12-14 15:18:02,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:18:02,412 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-14 15:18:02,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:18:02,417 INFO L225 Difference]: With dead ends: 1248 [2021-12-14 15:18:02,417 INFO L226 Difference]: Without dead ends: 638 [2021-12-14 15:18:02,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:18:02,424 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 215 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:18:02,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 342 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:18:02,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-12-14 15:18:02,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 636. [2021-12-14 15:18:02,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 1.5165354330708662) internal successors, (963), 635 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:02,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 963 transitions. [2021-12-14 15:18:02,471 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 963 transitions. Word has length 53 [2021-12-14 15:18:02,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:18:02,472 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 963 transitions. [2021-12-14 15:18:02,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:02,474 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 963 transitions. [2021-12-14 15:18:02,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-14 15:18:02,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:18:02,479 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:18:02,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 15:18:02,480 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:18:02,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:18:02,481 INFO L85 PathProgramCache]: Analyzing trace with hash -69908416, now seen corresponding path program 1 times [2021-12-14 15:18:02,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:18:02,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869388093] [2021-12-14 15:18:02,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:18:02,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:18:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:18:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:18:02,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:18:02,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869388093] [2021-12-14 15:18:02,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869388093] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:18:02,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:18:02,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:18:02,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951895701] [2021-12-14 15:18:02,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:18:02,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:18:02,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:18:02,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:18:02,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:18:02,561 INFO L87 Difference]: Start difference. First operand 636 states and 963 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:02,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:18:02,651 INFO L93 Difference]: Finished difference Result 1768 states and 2685 transitions. [2021-12-14 15:18:02,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:18:02,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-14 15:18:02,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:18:02,656 INFO L225 Difference]: With dead ends: 1768 [2021-12-14 15:18:02,656 INFO L226 Difference]: Without dead ends: 1158 [2021-12-14 15:18:02,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:18:02,657 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 47 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:18:02,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 181 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:18:02,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2021-12-14 15:18:02,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1140. [2021-12-14 15:18:02,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.4846356453028973) internal successors, (1691), 1139 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:02,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1691 transitions. [2021-12-14 15:18:02,726 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1691 transitions. Word has length 53 [2021-12-14 15:18:02,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:18:02,726 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 1691 transitions. [2021-12-14 15:18:02,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:02,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1691 transitions. [2021-12-14 15:18:02,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-14 15:18:02,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:18:02,728 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:18:02,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 15:18:02,728 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:18:02,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:18:02,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1517987980, now seen corresponding path program 1 times [2021-12-14 15:18:02,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:18:02,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986062734] [2021-12-14 15:18:02,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:18:02,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:18:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:18:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:18:02,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:18:02,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986062734] [2021-12-14 15:18:02,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986062734] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:18:02,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:18:02,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:18:02,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532281965] [2021-12-14 15:18:02,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:18:02,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:18:02,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:18:02,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:18:02,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:18:02,777 INFO L87 Difference]: Start difference. First operand 1140 states and 1691 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:02,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:18:02,899 INFO L93 Difference]: Finished difference Result 2254 states and 3356 transitions. [2021-12-14 15:18:02,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:18:02,900 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-14 15:18:02,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:18:02,911 INFO L225 Difference]: With dead ends: 2254 [2021-12-14 15:18:02,912 INFO L226 Difference]: Without dead ends: 1140 [2021-12-14 15:18:02,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:18:02,913 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 243 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:18:02,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 94 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:18:02,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-12-14 15:18:02,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 1140. [2021-12-14 15:18:02,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.4705882352941178) internal successors, (1675), 1139 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:02,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1675 transitions. [2021-12-14 15:18:02,987 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1675 transitions. Word has length 54 [2021-12-14 15:18:02,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:18:02,987 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 1675 transitions. [2021-12-14 15:18:02,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:02,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1675 transitions. [2021-12-14 15:18:02,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-14 15:18:02,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:18:02,989 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:18:02,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 15:18:02,989 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:18:02,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:18:02,990 INFO L85 PathProgramCache]: Analyzing trace with hash -2047278481, now seen corresponding path program 1 times [2021-12-14 15:18:02,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:18:02,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833314920] [2021-12-14 15:18:02,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:18:02,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:18:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:18:03,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:18:03,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:18:03,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833314920] [2021-12-14 15:18:03,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833314920] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:18:03,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:18:03,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:18:03,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131874685] [2021-12-14 15:18:03,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:18:03,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:18:03,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:18:03,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:18:03,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:18:03,032 INFO L87 Difference]: Start difference. First operand 1140 states and 1675 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:03,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:18:03,163 INFO L93 Difference]: Finished difference Result 2254 states and 3324 transitions. [2021-12-14 15:18:03,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:18:03,163 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-14 15:18:03,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:18:03,167 INFO L225 Difference]: With dead ends: 2254 [2021-12-14 15:18:03,167 INFO L226 Difference]: Without dead ends: 1140 [2021-12-14 15:18:03,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:18:03,169 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 266 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:18:03,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 78 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:18:03,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-12-14 15:18:03,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 1140. [2021-12-14 15:18:03,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.456540825285338) internal successors, (1659), 1139 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:03,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1659 transitions. [2021-12-14 15:18:03,252 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1659 transitions. Word has length 54 [2021-12-14 15:18:03,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:18:03,252 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 1659 transitions. [2021-12-14 15:18:03,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:03,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1659 transitions. [2021-12-14 15:18:03,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-14 15:18:03,253 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:18:03,253 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:18:03,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 15:18:03,254 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:18:03,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:18:03,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1919193174, now seen corresponding path program 1 times [2021-12-14 15:18:03,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:18:03,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964385475] [2021-12-14 15:18:03,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:18:03,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:18:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:18:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:18:03,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:18:03,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964385475] [2021-12-14 15:18:03,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964385475] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:18:03,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:18:03,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:18:03,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719827776] [2021-12-14 15:18:03,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:18:03,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:18:03,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:18:03,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:18:03,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:18:03,296 INFO L87 Difference]: Start difference. First operand 1140 states and 1659 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:03,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:18:03,430 INFO L93 Difference]: Finished difference Result 2254 states and 3292 transitions. [2021-12-14 15:18:03,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:18:03,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-14 15:18:03,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:18:03,435 INFO L225 Difference]: With dead ends: 2254 [2021-12-14 15:18:03,435 INFO L226 Difference]: Without dead ends: 1140 [2021-12-14 15:18:03,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:18:03,437 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 250 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:18:03,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 86 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:18:03,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-12-14 15:18:03,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 1140. [2021-12-14 15:18:03,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.4424934152765583) internal successors, (1643), 1139 states have internal predecessors, (1643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:03,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1643 transitions. [2021-12-14 15:18:03,514 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1643 transitions. Word has length 54 [2021-12-14 15:18:03,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:18:03,514 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 1643 transitions. [2021-12-14 15:18:03,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:03,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1643 transitions. [2021-12-14 15:18:03,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-14 15:18:03,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:18:03,515 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:18:03,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 15:18:03,516 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:18:03,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:18:03,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1053660785, now seen corresponding path program 1 times [2021-12-14 15:18:03,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:18:03,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712883674] [2021-12-14 15:18:03,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:18:03,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:18:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:18:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:18:03,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:18:03,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712883674] [2021-12-14 15:18:03,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712883674] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:18:03,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:18:03,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:18:03,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979930981] [2021-12-14 15:18:03,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:18:03,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:18:03,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:18:03,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:18:03,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:18:03,576 INFO L87 Difference]: Start difference. First operand 1140 states and 1643 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:03,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:18:03,720 INFO L93 Difference]: Finished difference Result 1929 states and 2780 transitions. [2021-12-14 15:18:03,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:18:03,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-14 15:18:03,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:18:03,728 INFO L225 Difference]: With dead ends: 1929 [2021-12-14 15:18:03,728 INFO L226 Difference]: Without dead ends: 1927 [2021-12-14 15:18:03,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:18:03,729 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 142 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:18:03,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 507 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:18:03,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1927 states. [2021-12-14 15:18:03,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1927 to 1172. [2021-12-14 15:18:03,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 1171 states have (on average 1.4235695986336465) internal successors, (1667), 1171 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:03,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1667 transitions. [2021-12-14 15:18:03,834 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1667 transitions. Word has length 54 [2021-12-14 15:18:03,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:18:03,834 INFO L470 AbstractCegarLoop]: Abstraction has 1172 states and 1667 transitions. [2021-12-14 15:18:03,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:03,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1667 transitions. [2021-12-14 15:18:03,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-14 15:18:03,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:18:03,835 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:18:03,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 15:18:03,836 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:18:03,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:18:03,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1226019551, now seen corresponding path program 1 times [2021-12-14 15:18:03,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:18:03,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471637839] [2021-12-14 15:18:03,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:18:03,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:18:03,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:18:03,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:18:03,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:18:03,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471637839] [2021-12-14 15:18:03,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471637839] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:18:03,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:18:03,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:18:03,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312535416] [2021-12-14 15:18:03,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:18:03,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:18:03,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:18:03,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:18:03,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:18:03,884 INFO L87 Difference]: Start difference. First operand 1172 states and 1667 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:04,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:18:04,008 INFO L93 Difference]: Finished difference Result 2299 states and 3305 transitions. [2021-12-14 15:18:04,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:18:04,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-14 15:18:04,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:18:04,014 INFO L225 Difference]: With dead ends: 2299 [2021-12-14 15:18:04,014 INFO L226 Difference]: Without dead ends: 1656 [2021-12-14 15:18:04,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:18:04,016 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 66 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:18:04,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 234 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:18:04,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-12-14 15:18:04,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1654. [2021-12-14 15:18:04,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 1.4162129461584998) internal successors, (2341), 1653 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:04,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 2341 transitions. [2021-12-14 15:18:04,143 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 2341 transitions. Word has length 54 [2021-12-14 15:18:04,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:18:04,144 INFO L470 AbstractCegarLoop]: Abstraction has 1654 states and 2341 transitions. [2021-12-14 15:18:04,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:04,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 2341 transitions. [2021-12-14 15:18:04,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-14 15:18:04,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:18:04,146 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:18:04,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 15:18:04,146 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:18:04,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:18:04,147 INFO L85 PathProgramCache]: Analyzing trace with hash 595199301, now seen corresponding path program 1 times [2021-12-14 15:18:04,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:18:04,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114802762] [2021-12-14 15:18:04,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:18:04,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:18:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:18:04,202 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 15:18:04,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:18:04,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114802762] [2021-12-14 15:18:04,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114802762] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:18:04,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:18:04,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:18:04,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676174213] [2021-12-14 15:18:04,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:18:04,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:18:04,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:18:04,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:18:04,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:18:04,205 INFO L87 Difference]: Start difference. First operand 1654 states and 2341 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:04,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:18:04,766 INFO L93 Difference]: Finished difference Result 8472 states and 12022 transitions. [2021-12-14 15:18:04,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:18:04,767 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-14 15:18:04,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:18:04,790 INFO L225 Difference]: With dead ends: 8472 [2021-12-14 15:18:04,791 INFO L226 Difference]: Without dead ends: 6846 [2021-12-14 15:18:04,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 15:18:04,795 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 486 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:18:04,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 563 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:18:04,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6846 states. [2021-12-14 15:18:05,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6846 to 3278. [2021-12-14 15:18:05,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3278 states, 3277 states have (on average 1.4125724748245347) internal successors, (4629), 3277 states have internal predecessors, (4629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:05,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 4629 transitions. [2021-12-14 15:18:05,084 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 4629 transitions. Word has length 77 [2021-12-14 15:18:05,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:18:05,084 INFO L470 AbstractCegarLoop]: Abstraction has 3278 states and 4629 transitions. [2021-12-14 15:18:05,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:05,085 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 4629 transitions. [2021-12-14 15:18:05,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-14 15:18:05,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:18:05,086 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:18:05,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 15:18:05,087 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:18:05,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:18:05,088 INFO L85 PathProgramCache]: Analyzing trace with hash -558746805, now seen corresponding path program 1 times [2021-12-14 15:18:05,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:18:05,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713565308] [2021-12-14 15:18:05,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:18:05,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:18:05,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:18:05,150 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-14 15:18:05,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:18:05,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713565308] [2021-12-14 15:18:05,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713565308] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:18:05,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:18:05,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:18:05,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810320589] [2021-12-14 15:18:05,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:18:05,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:18:05,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:18:05,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:18:05,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:18:05,153 INFO L87 Difference]: Start difference. First operand 3278 states and 4629 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:05,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:18:05,741 INFO L93 Difference]: Finished difference Result 10096 states and 14310 transitions. [2021-12-14 15:18:05,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:18:05,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-14 15:18:05,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:18:05,771 INFO L225 Difference]: With dead ends: 10096 [2021-12-14 15:18:05,771 INFO L226 Difference]: Without dead ends: 8470 [2021-12-14 15:18:05,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 15:18:05,777 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 473 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:18:05,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 577 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:18:05,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8470 states. [2021-12-14 15:18:06,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8470 to 5718. [2021-12-14 15:18:06,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5718 states, 5717 states have (on average 1.4065069092181215) internal successors, (8041), 5717 states have internal predecessors, (8041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:06,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5718 states to 5718 states and 8041 transitions. [2021-12-14 15:18:06,288 INFO L78 Accepts]: Start accepts. Automaton has 5718 states and 8041 transitions. Word has length 77 [2021-12-14 15:18:06,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:18:06,288 INFO L470 AbstractCegarLoop]: Abstraction has 5718 states and 8041 transitions. [2021-12-14 15:18:06,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:06,289 INFO L276 IsEmpty]: Start isEmpty. Operand 5718 states and 8041 transitions. [2021-12-14 15:18:06,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-14 15:18:06,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:18:06,291 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:18:06,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 15:18:06,292 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:18:06,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:18:06,292 INFO L85 PathProgramCache]: Analyzing trace with hash -262701377, now seen corresponding path program 1 times [2021-12-14 15:18:06,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:18:06,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681143322] [2021-12-14 15:18:06,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:18:06,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:18:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:18:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 15:18:06,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:18:06,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681143322] [2021-12-14 15:18:06,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681143322] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:18:06,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:18:06,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:18:06,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238971134] [2021-12-14 15:18:06,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:18:06,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:18:06,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:18:06,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:18:06,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:18:06,361 INFO L87 Difference]: Start difference. First operand 5718 states and 8041 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:07,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:18:07,027 INFO L93 Difference]: Finished difference Result 11720 states and 16598 transitions. [2021-12-14 15:18:07,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:18:07,028 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-14 15:18:07,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:18:07,051 INFO L225 Difference]: With dead ends: 11720 [2021-12-14 15:18:07,052 INFO L226 Difference]: Without dead ends: 10094 [2021-12-14 15:18:07,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 15:18:07,059 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 438 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:18:07,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 663 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:18:07,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10094 states. [2021-12-14 15:18:07,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10094 to 7342. [2021-12-14 15:18:07,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7342 states, 7341 states have (on average 1.4070290151205558) internal successors, (10329), 7341 states have internal predecessors, (10329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:07,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7342 states to 7342 states and 10329 transitions. [2021-12-14 15:18:07,688 INFO L78 Accepts]: Start accepts. Automaton has 7342 states and 10329 transitions. Word has length 77 [2021-12-14 15:18:07,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:18:07,689 INFO L470 AbstractCegarLoop]: Abstraction has 7342 states and 10329 transitions. [2021-12-14 15:18:07,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:07,689 INFO L276 IsEmpty]: Start isEmpty. Operand 7342 states and 10329 transitions. [2021-12-14 15:18:07,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-14 15:18:07,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:18:07,692 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:18:07,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 15:18:07,692 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:18:07,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:18:07,693 INFO L85 PathProgramCache]: Analyzing trace with hash -2055185859, now seen corresponding path program 1 times [2021-12-14 15:18:07,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:18:07,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321192643] [2021-12-14 15:18:07,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:18:07,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:18:07,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:18:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 15:18:07,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:18:07,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321192643] [2021-12-14 15:18:07,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321192643] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:18:07,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:18:07,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:18:07,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695216240] [2021-12-14 15:18:07,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:18:07,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:18:07,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:18:07,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:18:07,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:18:07,749 INFO L87 Difference]: Start difference. First operand 7342 states and 10329 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:08,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:18:08,458 INFO L93 Difference]: Finished difference Result 12336 states and 17494 transitions. [2021-12-14 15:18:08,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:18:08,458 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-12-14 15:18:08,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:18:08,482 INFO L225 Difference]: With dead ends: 12336 [2021-12-14 15:18:08,482 INFO L226 Difference]: Without dead ends: 11214 [2021-12-14 15:18:08,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 15:18:08,492 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 435 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:18:08,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 586 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:18:08,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11214 states. [2021-12-14 15:18:09,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11214 to 8462. [2021-12-14 15:18:09,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8462 states, 8461 states have (on average 1.4098806287672851) internal successors, (11929), 8461 states have internal predecessors, (11929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:09,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8462 states to 8462 states and 11929 transitions. [2021-12-14 15:18:09,149 INFO L78 Accepts]: Start accepts. Automaton has 8462 states and 11929 transitions. Word has length 78 [2021-12-14 15:18:09,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:18:09,149 INFO L470 AbstractCegarLoop]: Abstraction has 8462 states and 11929 transitions. [2021-12-14 15:18:09,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:09,150 INFO L276 IsEmpty]: Start isEmpty. Operand 8462 states and 11929 transitions. [2021-12-14 15:18:09,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 15:18:09,156 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:18:09,156 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:18:09,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 15:18:09,157 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:18:09,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:18:09,158 INFO L85 PathProgramCache]: Analyzing trace with hash -144941472, now seen corresponding path program 1 times [2021-12-14 15:18:09,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:18:09,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932746948] [2021-12-14 15:18:09,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:18:09,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:18:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:18:09,217 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:18:09,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:18:09,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932746948] [2021-12-14 15:18:09,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932746948] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:18:09,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:18:09,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:18:09,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525193220] [2021-12-14 15:18:09,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:18:09,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:18:09,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:18:09,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:18:09,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:18:09,220 INFO L87 Difference]: Start difference. First operand 8462 states and 11929 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:09,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:18:09,561 INFO L93 Difference]: Finished difference Result 14658 states and 20769 transitions. [2021-12-14 15:18:09,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:18:09,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-14 15:18:09,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:18:09,577 INFO L225 Difference]: With dead ends: 14658 [2021-12-14 15:18:09,577 INFO L226 Difference]: Without dead ends: 6224 [2021-12-14 15:18:09,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:18:09,590 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 48 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:18:09,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 226 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:18:09,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6224 states. [2021-12-14 15:18:10,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6224 to 6222. [2021-12-14 15:18:10,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6222 states, 6221 states have (on average 1.4110271660504743) internal successors, (8778), 6221 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:10,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6222 states to 6222 states and 8778 transitions. [2021-12-14 15:18:10,082 INFO L78 Accepts]: Start accepts. Automaton has 6222 states and 8778 transitions. Word has length 79 [2021-12-14 15:18:10,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:18:10,083 INFO L470 AbstractCegarLoop]: Abstraction has 6222 states and 8778 transitions. [2021-12-14 15:18:10,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:10,083 INFO L276 IsEmpty]: Start isEmpty. Operand 6222 states and 8778 transitions. [2021-12-14 15:18:10,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 15:18:10,085 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:18:10,085 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:18:10,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 15:18:10,086 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:18:10,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:18:10,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1559581035, now seen corresponding path program 1 times [2021-12-14 15:18:10,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:18:10,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095300734] [2021-12-14 15:18:10,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:18:10,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:18:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:18:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:18:10,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:18:10,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095300734] [2021-12-14 15:18:10,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095300734] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:18:10,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832755779] [2021-12-14 15:18:10,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:18:10,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:18:10,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:18:10,315 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:18:10,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 15:18:10,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:18:10,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 15:18:10,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:18:10,798 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 15:18:10,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 15:18:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 15:18:11,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832755779] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 15:18:11,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 15:18:11,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-14 15:18:11,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670758953] [2021-12-14 15:18:11,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 15:18:11,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-14 15:18:11,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:18:11,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-14 15:18:11,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-14 15:18:11,036 INFO L87 Difference]: Start difference. First operand 6222 states and 8778 transitions. Second operand has 18 states, 18 states have (on average 12.38888888888889) internal successors, (223), 18 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:23,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:18:23,275 INFO L93 Difference]: Finished difference Result 102963 states and 141782 transitions. [2021-12-14 15:18:23,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-12-14 15:18:23,276 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 12.38888888888889) internal successors, (223), 18 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-14 15:18:23,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:18:23,453 INFO L225 Difference]: With dead ends: 102963 [2021-12-14 15:18:23,453 INFO L226 Difference]: Without dead ends: 96771 [2021-12-14 15:18:23,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9520 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3246, Invalid=19706, Unknown=0, NotChecked=0, Total=22952 [2021-12-14 15:18:23,496 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 7384 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 1724 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7384 SdHoareTripleChecker+Valid, 1619 SdHoareTripleChecker+Invalid, 2015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 1724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 15:18:23,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7384 Valid, 1619 Invalid, 2015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 1724 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 15:18:23,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96771 states. [2021-12-14 15:18:28,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96771 to 46152. [2021-12-14 15:18:28,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46152 states, 46151 states have (on average 1.3439578774024399) internal successors, (62025), 46151 states have internal predecessors, (62025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:28,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46152 states to 46152 states and 62025 transitions. [2021-12-14 15:18:28,192 INFO L78 Accepts]: Start accepts. Automaton has 46152 states and 62025 transitions. Word has length 79 [2021-12-14 15:18:28,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:18:28,193 INFO L470 AbstractCegarLoop]: Abstraction has 46152 states and 62025 transitions. [2021-12-14 15:18:28,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.38888888888889) internal successors, (223), 18 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:18:28,193 INFO L276 IsEmpty]: Start isEmpty. Operand 46152 states and 62025 transitions. [2021-12-14 15:18:28,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-14 15:18:28,196 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:18:28,196 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:18:28,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 15:18:28,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-14 15:18:28,411 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:18:28,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:18:28,412 INFO L85 PathProgramCache]: Analyzing trace with hash -2040940735, now seen corresponding path program 1 times [2021-12-14 15:18:28,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:18:28,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22498105] [2021-12-14 15:18:28,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:18:28,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:18:28,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:18:28,554 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:18:28,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:18:28,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22498105] [2021-12-14 15:18:28,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22498105] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:18:28,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333532274] [2021-12-14 15:18:28,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:18:28,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:18:28,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:18:28,560 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:18:28,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 15:18:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:18:28,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-14 15:18:28,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:18:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:18:29,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 15:18:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:18:30,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333532274] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 15:18:30,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 15:18:30,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2021-12-14 15:18:30,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839929243] [2021-12-14 15:18:30,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 15:18:30,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-14 15:18:30,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:18:30,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-14 15:18:30,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-12-14 15:18:30,110 INFO L87 Difference]: Start difference. First operand 46152 states and 62025 transitions. Second operand has 26 states, 26 states have (on average 8.615384615384615) internal successors, (224), 25 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)